Telephone-transmitter.



Patented Sept. 15,1908;

fizz/safe Liz ear H. F. ALBRIGHT. TELEPHONE TRANSMITTER.

APPLICATION FILED 00T.28, 1907.

iifg'ssea:

UNITED STATES PATENT onnron.

HENRY F. ALBRIGHT, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO WESTERN ELECTRIC COM- PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TELEPHONE-TRANSMITTER.

Specification of Letters Patent.

Patented Sept. 15, 1908.

Application filed October 28,1907. Serial No. 399,405.

To all whom it may concern:

Be it known that I, HENRY F. ALBRIGHT, citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented a certain new and useful Improvement in Telephone- Transmitters, of which the following is a full,

clear, concise, and exact description.

My invention relates to a telephone transmitter, and more particularly to a unit type of transmitter in which the button is non-adjustably-mounted upon its supporting 'bridge,'and in which, therefore, the movable electrode must be adjustably connected to the diaphragm.

The object of my invention is to provide improved means for connecting the stem of the movable electrode to the diaphragm.

connected whether or not they are eld eX- actly perpemlicularly.

My invention consists of a bushing mounted on the transmitter d1aphragm,sa1d bushing having a'tapered or conical o ening through which the stem of the electro e rojects, and a nut for clamping the bus ing about the stud. Since the opening in the bushing is tapered, the stem Wlll. be engaged by the bushing along a single circumferential line, and will not, therefore, interfere with the assembling of the stem and the diaphragm at the angle at which theynaturally meet.

My invention may be more readily nnderstood by reference to the accompanying drawings, in' which i Figure. l is a central sectional view of the transmitter; Fig. 2 is an enlarged fragmentarv view, showing the stud and bushing in end elem-tion; l ig. 3 is an enlarged fragmentary view showing the clamping bushing in central longitudinal section; and Fig. 4 is a.

view similar to Fig. I) of the preferred modification of my invention.

Similar lct tors of reference are used to dosiguatc similar parts wherever shown.

The button 1 may be of the usual wellknown form, and is mounted upon the bridge 2 in the usual manner, with the stem 3 of the movable electrode 4 projecting through the diaphragm 5.

Secured to the diaphragm 5, about the opening throu h which the stem 3 projects, is a slotted col ar or bushing 6 having a conical opening 7 tapering toward the outer end of the bushing. The bushing 6 has the exterior surface of the frustum of-a cone, and is 5 threaded to receive a nut 8. After the stem 3 is adjusted with respect to the diaphra m 5, the bushing 6 is clampedfto said stem by the nut 8. In the form shown in Figs. 1 and 3 the outer end of the bushing 6 is the only 79;- portion thereof which engages the stem, and,

ience there is no tendency to alter the direc-..'

tion in which the stem projects as might be the case. if the hole 7 were not tapered.

In Fig. 4, I have shown a modified form of my invention in which the opening 9 1n the- 'bushmg 6 is most restricted intermediate lts ends, as at 10, tapering from that point to-.- ward each end of the bushing, the opening 9 being thus in the form of a double cone. The 80 stem 3 is thus securely gripped by the bushing 6 at the point 10.

While in the drawings the stem 3 is shown as meeting the diaphragm at exactly right angles, it is obvious that the tapered opening 35 through the bushing 6 readily permits, without imposing a strain on the parts, of such slight variations from an exact right angle as are commonly met with in actual practice.

' I claim:

1. In a telephone transmitter, a button provided with a movable electrode having a stem projecting therefrom, a diaphragm, means for supporting said button and diaphragm, a bushing on said diapllilragm having a tapered opening through w ch said stem PIQJCCtS, and means for clamping sald bushmg about said stem.

2. In a telephone transmitter, a dia phragm having a central opening, a button at the rear of said diaphragm having a stem projecting through said opening, a bushing upon the l'ront face ofsaid diaphragm about said opening, said bushing having an opening clamping said bushing about said stem.

3. in a telephone transmitter, a diaphragm having a-central opening, a button at the rear of said diaphragnrhavinga stenr tapering from said diaphra m, and means for -projecting,through sa d opening, a tapered,

exteriorly threaded bushing upon the front face of said diaphragm about said opening, said bushing having a conical opening tapering from said diaphragm, and 'a nut for clamging said bushing about said stem.

4. n a telephone transmitter, a diaphragm having a central opening, a button at the rear of said diaphragm having a stem projecting through said opening, a bushing upon the front face of said diaphragm about said opening, said bushing having an opening In witness whereof, I hereunto subscribe 15 my name this twenty-first day of October A. 1)., 1907.

. HENRY F. ALBRIGHT.

Witnesses:

FRANoIs L. GILMAN, J. W. BANCKER. 

